456 



Popular Science Monthly 



Bath Water Supply System for an 

 Army Camp 



WHEN the cold days of early winter 

 set in the army boys on the Border 

 began devising ways and means of heating 

 water for the bath. In many camps differ- 

 ent devices were 



_ TROM COILTO BOILER 

 '52 GALLON 

 BARREL 



ordinary reamer for metal. Not only is 

 this true, but the construction of a reamer 

 prohibits it from even starting in a hole 

 any smaller, as the end is only 1/64 in. 

 smaller than the final size. 



Reamers do not cut oversize. Thus, if a 



hole is reamed to % in. and a shaft is 



tight in it, the 



to be seen, but 

 the one that ap- 

 pealed to me 

 most was a bar- 

 rel used as a 

 tank, with a coil 

 of pipe connected 

 with it for a 

 water heater. 

 The barrel was 

 placed on a table 

 to make its lower 

 end considerably 

 above the fur- 

 nace top. A pipe 

 was led from 

 the bottom of 



• TO COIL f ROM BARREL ' 



A range boiler and a barrel with pipe connections for heating 

 water from an incinerator fire to supply hot water for baths 



the barrel down to a tee joint, then horizon- 

 tally to the end of the furnace, where 

 another tee was used to make connections 

 for the coil in the furnace fireplace. The 

 opposite end of the pipe-coil was connected 

 with the pipe system from the top end of a 

 range boiler set on another small table to 

 bring its lower end above the fireplace coil. 

 The barrel supplied the water to the tank 

 as it was drawn out through the faucet. The 

 furnace in this case was the incinerator, 

 which was kept burning at all times. Con- 

 sequently there was hot water ready for 

 shaving and washing, as long as the barrel 

 was kept filled. This is a simple way of 

 solving a hard problem and can be readily 

 adapted for use in small camps.— George 

 M. Petersen. 



in 



opening cannot 

 be enlarged a tri- 

 fle, or "reamed 

 out a little so 

 that the shaft is 

 loose." Stock 

 reamers are made 

 in sizes varying 

 by sixteenths. 

 Any size between 

 must be made to 

 order. Expansion 

 reamers are not 

 made in sizes un- 

 der % in. The 

 reason for this 

 construction is 

 to allow the teeth to be sharpened and "set 

 out" again to the original size. They are 

 seldom found in small shops and do not 

 enter into the case in the every day re- 

 quest to "ream it out a little." 



Remember a hole can be enlarged not 

 more than 1/64 in. by a reamer and not 

 even that much unless the hole happens to 

 be that 1/64-in. under a standard size in 

 sixteenths. 



The Right Meaning of the 

 Term Reaming 



EVERY machinist knows what it is to be 

 asked to "ream" out a hole a little 

 larger, — "little" varying from a few 

 thousandths of an inch to 3^2 i n - As a 

 matter of fact the lay public knows very 

 little about reaming. The truth is this: 

 Holes for reaming are drilled from .003 to 

 1/64 in. smaller than the final size. Then a 

 reamer is used to bring the hole up to the 

 exact size, round and true, which cannot be 

 obtained with a drill alone. More than 

 this amount cannot be taken out with any 



A Handy Method of Sending 

 Small Coin by Mail • 



A SAFE and handy method of inclosing 

 small coins in letters, if you do not 

 happen to have the regular coin 

 holder at hand, is to use a piece of 

 corrugated cardboard, such 

 may be found in discarded 

 wrappings, egg-boxes, etc. 

 Simply cut a slit in one side of 

 the corrugated boa rd , 

 push the coin in and 

 press it down flat. 

 Be sure to write 

 on the outside of 

 the cardboard, 

 "Coin in here" 

 or "Money in- 

 side the card," 

 so that the re- 

 ceiver can readily find the coin between 

 the sides. — Albert B. Wegener. 



Corrugated board 



Slitting a corrugated 

 board to hold coin 



